Vehicle jack



May 8, 15923.

P. I. NAMTVEDT VEHICLE JACK Filed Feb. 14, 1922 Patented May 8, 1923.

PETER IVABSEN NAMTVEDT, 01F TERRIL, IOWA.

VEHICLE JACK.

Application filed February 14, 1922. Serial No. 536,584..

To all whom it may concern:

Be it known that 1, PETER at Terril, in the county of Dickinson, State of Iowa, have invented a new and useful Vehicle Jack; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which 1t appertains to make and use the same.

The invention relates to vehicle jacks, and

has for its object to provide a device of this character comprising a bifurcated standard, a lever pivotally mounted in the bifurcation of said standard and provided with" link mechanism having a parallel movement and lazy tong movement, and adapted to engage an axle and force the same upwardly upon a downward movement of one end of the lever. Also to provide a pivoted spring ac.- tuateddog adapted to cooperate with a notch in the standard for holding the device inextended position and the axle in raised position.

A further object is to provide a pivoted weight member cooperating with a'spring for releasing the detent against the action of its spring when it is desired to lower the de vice and the axle supported thereon.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth. shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing:

Fi re 1 is a side elevation of the jack, showing the samein extended position.

Figure 2 is a rear elevation of the jack.

Figure 3 is a horizontal sectional view through the standard taken on line 3-3 of Figure 1,.

Referring to the drawing, the numeral 1 designates the base of the jack, and 2 an upwardly extending provided with a rectangular shaped chamber 3. Slidably mounted and vertically movable in the chamber 3 is the lower rectangular shaped portion 1 of the standard 5. The standard 5 is held in various positions by means of the nose 6 of the detent 7 cooperating with any of the notches 8 in the portion 4 of the standard. The detent 7 is provided IVARs EN Nan'r-l mm, a citizen of the United States, residing sleeve carried thereby and with a substantially horizontally disposed arm 9 adapted to be engaged by the foot of the operator for rocking the lever detent 7 on its pivotal point 10- against the action'of the spring 11, thereby allowing the standard 5 to be lowered-to any desired position according to the type of vehicle being raised.

Pivotally mounted in the bifurcation 12 of the standard 5 on 'the' bolt 13 is an angularly shaped operating lever 14, the arm 15 of which extends outwardly and is provided with a chamber 16 for the'recept-ion ofan extension, if sodesired. Pivoted at 17 to the arm 18 of the lever are spaced links 19 and 20, which links are in parallel relation to each other,- and are held in parallelrelation during tion bymeans of the link 21', which has its ends pivoted-at. 22 to-the upper ends of the spaced links 19 and :20, which-link21. in connection with the arm 18, causes a parallel movement of the linksl9 and 20 when the same are extended in position shown in- Figure 1 for raising an axle of the vehicle when the same is disposed in an axle engaglng member. 23 of the link 19. Disposed inparallel relation to the link 21, and to the arm 18 of the lever 14, is a link2t, which link is pivoted at 25 to the links 19 and 20, and at 26 within the bifurcation of the standard 5.

The link 24:, when the arm 15 of the lever 1a is forced downwardly, causes the upper a vehicle jaokingor lowering POSlend 27 of the link 20 to pass upwardly and rearwardly until its arm 28 is disposed above the upper end of the standard 5, at which time the pivoted dog29 carried bythe arm 28 will move upwardly in engagement with the rear faces 30 of the arms 31 of the standard 5 until it is forced into engagement with the notch 32 in the arms by the spring 33. When the detent 29 is in engagement with the notches 32, the link members will be held in extended positions as shown in Figure 1, thereby holding the vehicle axle or other object in raised position. When the pivoted dog 29 is forced inwardly under the influence of the spring 33, the nose thereof engages a spring 34 securedto the standard by means of the bolts 13. The spring 3 1 is slightly weaker than the spring 33, therefore is bowed, and at the same time allows the pivoted dog 29 to move into engagement with the notches 32. However when it is desired to lower the device,the weighted cam 35 which is pivoted to one of the arms 31 at 36 is moved around in the direction of the I axle engaging arrow at until it engages the spring 34. The weighted cam is of sufiicient Weight that when the dog 29 is raised slightly by downward pressure on the arm 15 of the lever 14, the combined force of the spring and the Weighted cam 35 will be greater than the power of the spring 33, thereby moving the free end of the dog 29- outivardly in the direction of the arrow 6 and consequently allowing the arm to move upwardly and the member 23 to move downwardljz, thei l1 ing't-he axle.

From the above it .v'll be seen that a ack is provided"wherein the lazy tong principle is used, and one wherein the operation is positive and the parts are reduced to a minimum; I

The invention having been set forth What is claimed as new and useful-is:-

1. A vehicle jackcomprising abifurcated standard, a lever pivoted in the bifurcation of said standard, a parallel link device carried'by said lever and having one of its ends adapted to be forced upwardly upon a downwardmovement oi the-lever, an axle engaging element carried moved end, anda spring actuated dog carried by saidlinl: constructionand cooperating With a notch-in the standard for holding the linlrconstruction in extended position.

2, A vehicle jackcomprising a standard;

a lever pivoted to spaced armscarriedby said standard, parallel from each-other and having their lower endsdisposed links spaced pivoted to oneend of the pivotedlever, said links extending upwardly and eonnected toby the upwardly;

gethcr by a link, a second link pivoted between the arms of the stan-dardand having pivotal connections with the first mentioned parallel links, the upper end of the outer parallel linlr having an axle engaging element, the upper end or" the other parallel linl having its end above its pivoted point extended and disposed-above the upper end of the standard, a spring actuated dog pivoted to said extended enjd 'andpositioned to cooperate with a notch int-he standard and hold the links inextended position ,after a downward movement Of'lZ'llGPlBVGI.

3. The combination With a j ach, th free end-of said dog being formed into engrastandard :torholding; the jack in raised pov a pivoted dog carried by a vertically movable portioirot cnient With a notch in the jack" than the dog; and a pivoted" the standard fand springto overcome the tension of the ClOg=SpT1iigaIiCl fOiCBthe free end ofthe dog-out of engagementwiththe notch in c the standardf in testimony Whereof-I have signedm'y" name to this specification: inthe presenceoftwo subscribingWitnesses.

PETER IVARSEN NAMTVEDT.

"ditnesseS 1 M l dl'LLER, v p M SToaKns. 

